** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Groovy)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Focal)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Focal)
Importance: Undecided => High
** Changed in: linux (Ubuntu Focal)
Assignee: (unassigned) => Colin Ian King (colin-king)
** Changed in: linux (Ubuntu Groovy)
Importance: Undecided => High
** Changed in: linux (Ubuntu Groovy)
Assignee: (unassigned) => Colin Ian King (colin-king)
** Changed in: linux (Ubuntu Focal)
Status: New => In Progress
** Changed in: linux (Ubuntu Groovy)
Status: New => In Progress
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1869134
Title:
tcp_fastopen_backup_key.sh from net in ubuntu_kernel_selftests failed
on Eoan LPAR
Status in ubuntu-kernel-tests:
In Progress
Status in linux package in Ubuntu:
In Progress
Status in linux source package in Focal:
In Progress
Status in linux source package in Groovy:
In Progress
Bug description:
== SRU Justification Focal, Groovy ==
Running the tcp_fastopen_backup_key.sh from net in
ubuntu_kernel_selftests fails on little endian systems. This is a
regression that occurred because of commit 438ac88009bc ("net:
fastopen: robustness and endianness fixes for SipHash").
== Fix ==
Upstream (linux-next) fix:
commit f19008e676366c44e9241af57f331b6c6edf9552
Author: Jason Baron <[email protected]>
Date: Mon Aug 10 13:38:39 2020 -0400
tcp: correct read of TFO keys on big endian systems
== Test case ==
Run the kernel self tests tcp_fastopen_backup_key.sh. Currently this
generally fails on the last few test cases. With the fix the test
passes.
== Regression Potential ==
This fix touches the tcp fast open code paths so it can potentially
impact TCP fast opening and perhaps the TCP opening. However, this has
been tested on big and little endian systems with the regression
tests, so the regression risk is low with this fix.
----
Issue found on Eoan (5.3.0-42.34, 5.3.0-43.36) with all s390x instances:
- LPAR s2lp4
- zVM kernel03
- zKVM s2lp6g003
# selftests: net: tcp_fastopen_backup_key.sh
# PASS
# PASS
# PASS
# PASS
# PASS
# PASS
# PASS
# PASS
# PASS
# FAIL: TcpExtTCPFastOpenPassiveFail non-zero
not ok 30 selftests: net: tcp_fastopen_backup_key.sh # exit=1
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